Ryan McKenna, 13, inspires Twitter memes with his special moment.

A young boy who took a selfie with Justin Timberlake during his halftime Super Bowl performance has become an internet sensation.

Ryan McKenna, 13, is now known simply as the "Selfie Kid" after becoming part of the show when JT danced around him during the last number of his set.

The teenager's surprised and awkward appearance in front of the live international broadcast to 100 million viewers nearly stole the show from the former NSync star altogether. The broadcast showed Ryan freeze and look down at his phone as Timberlake strolled up to him and made him the centre of attention.

The boy then took a selfie with the legendary performer and became an internet sensation.

Ryan, believed to be from Massachusetts, said: "I just thought to myself, 'I'll never get this opportunity again in my whole life.' I just went for it."

Ryan McKenna, 13, has become an internet sensationInstagram

One Twitter user wrote: "For real though, props to Ryan McKenna for keeping his cool in the moment. If I were him, this would be my holiday card every year."

McKenna scrolls through his phone before taking a selfie with Timberlake

Another said: "Ryan McKenna now the most popular kid... worldwide." A third added: "Ryan McKenna, super bowl selfie kid, goes to a school that costs 35 grand a year. God please pick up."

Ryan said: "I don't even know what to think. All my friends have been texting me and stuff. It's insane.